72 FLORA OF SOUTH AUSTRALIA. 
Neptunia. 
Erect herb, leaves bipinnate; pod orbicular, l-seeded monosperma 
Peduncles long, slender; pod oblong, several-seeded... gracilis 
Acacia. 
Key to the chief groups. 
Leaves reduced to phyllodia or wantiug (except in the seedling plant which 
has pinnate leaves). 
Flowers in globular heads. 
1. Phyllodia absent, branchlets spinescent. 
11. Phyllodia spinescent, cylindrical or lanceolate, scattered. 
111. Phyllodia whorled, spinescent. 
tv. Phyllodia more or less cylindrical, elongate, not pungent. 
v. Phyllodia more or less ovate, if linear very short, more or less 
oblique, usually acutely pointed, and 1-nerved. 
vi. Phyllodia flat, prominently 1-nerved, long and narrow. 
vul. Phyllodia flat, 2-nerved. 
vi. Phyllodia flat, 3- to 5-nerved. 
1x. Phyllodia flat, with numerous striae. 
Flowers in cylindrical spikes. 
x. Phyllodia rigid, spinescent. 
x1. Phyllodia not spinescent. 
Leaves all bipinnate. 
The seeds are strophiolate and longitudinally placed in the pods except 
when otherwise stated. 
List of species having :— 
Large bracts to the unexpanded heads:—+teaphylla, spinescens, suaveolens, 
sublanata. 
Spinescent stipules:—armata, aspera, Farnesiana, oxycedrus, pyrifolia, 
Sentis, strongylophylla. 
Spinescent branchlets :—acanthoclada, continua, erinacea, Peuce, spinescens. 
Viscid branchlets :—dodonaeifolia, montana, verniciflua. 
Transverse or oblique seeds:—anceps, aneura, Burkittii, craspedocarpa, 
cyperophylla, dictyophleba, impressa, Kempeana, lysiphloia, minutifolia, 
Murrayana, notabilis, retivenea, Sentis, Spilleriana, spondylophylla, 
stipuligera, strongylophylla, suaveolens, 
Funicle doubly bent around the seed:—cyclopis, melanoxylon, notabilis, 
retinodes, Wattsiana. 
No strophiole :—estrophiolata, vomeriformis. 
1. Phyllodia absent, the branchlets resembling 
spinescent phyllodia. 
Branchlets shortly decurrent with stem, terete, 1 to 
2 in. long; flowers rather large, many in each 
solitary head ; pod narrow, twisted, constricted 
between the seeds ... 4 ; ' ... continua 
Pod very flat and broad; branchlets crowded, 
slender and rigid, 2 to 4 in. long = .-. Reuce 
